<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>系统首页</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            text-align: center;
            margin-top: 100px;
            background-color: #f5f5f5;
        }
        .container {
            max-width: 600px;
            margin: 0 auto;
            padding: 20px;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        h1 {
            color: #333;
        }
        .btn {
            display: inline-block;
            padding: 10px 20px;
            margin: 10px;
            background-color: #007bff;
            color: white;
            text-decoration: none;
            border-radius: 5px;
        }
        .btn:hover {
            background-color: #0056b3;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>欢迎使用系统</h1>
        <p>请选择您的操作</p>
        <div>
            <a href="/login" class="btn">用户登录</a>
            <a href="/register" class="btn">用户注册</a>
        </div>
    </div>
</body>
</html>